NO.PZ2020011901000014
问题如下：
What is a poison pill? Give three examples.
解释：
A poison pill is a change made by a company to make it more difficult for another company to acquire it. Examples of poison pills are (a) granting key employees stock options that can be exercised in the event of a takeover, (b) making it impossible to fire directors for a period of time after a takeover, (c) issuing preferred shares that automatically become common shares in the event of a takeover, (d) allowing existing shareholders to buy new shares at a bargain price in the event of a takeover, (e) changing the voting structure to give management more control, and (f) allowing remaining shareholder to sell shares to the new owners in the event of a takeover at a premium price.
请翻译一下毒丸计划的解释。
